Bell-ringing mechanism for type-writing machines.



G. J. GRIFFITHS & 0. RODERICK. BELL BINDING MECHANISM roa TYPE WRITING MACHINES.

APPLICATION FILED JULY 11, 1910.

984,997. Patented Feb. 21, 1911.

R SHEETS-BEBE! 1.

5 P G. L GRIFFITHS a; C(RODERICK.

' BELL BINGING MECHANISM FOR TYPE WRITING MACHINES.

APPLIOATIO! FILED J-ULY 11, 1910.

984,907. Patented Feb.21, 1911.

' C/kazialadeizlcfy X7 old,

- 'UNlTE-D STATES PATENT orrion.

GEORGE J. GRIFFITHS AND CHARLES RODERICK, OF WOODSTOCK, ILLINOISr'ASSIG NORS TO THE OLIVER TYPEWRITER COMPANY, OF CHICAGO. ILLINOIS, A CORPORATION OF ILLINOIS.

BELL-RINGING MECHANISM FOR TYPE-WRITING l Application filed m 11, 1910. Serial No. 571,319.

. To all whom/it may concern:

Be it known that we, Gnonor: J. GRIEFITIIS and CHARLES Ronmnoir, citizens of the United States, and residents of lvoodstock, in the county of McHenry and State of Illinois, have invented certain new and useful Improvements in Bell-Ringing Mechanism for Type-Writing Machines; and we do hereby declare that the following is a .full, "clear. and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. V

This invention relates to improvements in typewriting machines, and particularly to certain novel features of construction of the bell ringing mechanism which indicates when the end of the line is approached.

bar of the paper carriage.

The invention consists of the matters hereinafter descrioed and more particularly pointed out in the appended claims.

In the drawings :Figure 1 is a top plan view of a typewriting machine with the paper-carriage removed and also the typecarriers, the upright standards upon which said type-carriers are supported being shown in cross-section, as is also a part of the front Fig. 2 is a partial vertical section through Fig. 1 on the line 2-42 thereof. with the bell-ringing hammer in that position which it occupies just previous to striking. Fig. 3 is a partial vertical section through Fig. 1 on the line 33 thereof, showing the bell-ringing hamwhich carries the hammer. Fig. 6 is aperspective view of the hammer-actuating and controlling spring.v

"We have shown our invention in connection with a machine of the Oliver type, substantially such as is illustrated in Letters Patent of the l nited States, No. 862.566, issued August 6th. 1907, to Theron L. Knapp and Clayton Harting, but it is to be understood that it may be applied to other machines of different types.

In the drawings,1 indicates the. base "of. the'machine; 2, the shift-frame; 3, the vertical standards upon which the type-memhers are supported; and 4, the front bar of the typewriter carriage. The said front, bar

Specification of Letters Patent.

Pat ent ed Said stop-me .aber is provided with the usual stop lug 9.

10 is the bell supported on the machine base 1. I

11 is a rock-shaft extending in a direction at right angles to the path of travel of the carriage and adapted to operate the bell ringing hammer 12 which is located adjacent the bell. Said rock shaft is mounted in suitatne bearing lugs 2 on the. shift-frame 2. Said rock-shaft projects forward of the front bar d of the paper-carriage and is there provided with a rigidly attached upright crank arm 13. 14 is a dog pivoted to the upper end of said crank arm and adapted to swing on an axis parallel to that of the rock shaft- 11. Said dog is adapted to swing freely toward the right but is limited in its movement toward the left. by a forwardly projecting lug or heel H which engages against the left-hand edge of the crank arm 13. Said dog projects up into the path' of the stop lug 9 on the stop member 8.

The hammer 12 is made and comprises a rounded head 12 which is adapted to engage the ,bell, and a stem 12 having a fiat base 12. Said hammer is pivotally mounted on a standard 15 comprising an upright member 15and. a slotted horizontal base 15. hammer is located near the base of its stem and to one side of its central longitudinal axis.

17 is a spring which controls the operation Feb. 21, 1911.

The pivotal point of the from a flat plate of the hammer. Said spring has a lateral,

extension in the form of an elongated loop 17 interposed between the base 15" of the standard 15, said loop being of substantially the form and size of said base, and having upstanding lugs 17 which'are adapted to engage against the margins of said base.-

Said spring and said hammenstamdard are secured to the machine base by a screw 18 which passes through the loop of the spring, and the slotted base of the standard. By this construction the hammer and its controlling spring maybe adjusted, together, to properly position them with reference to the bell. The spring 17 consists of an upright operating member 17 and a horizontal cushion member 1?. The cushion member 17 rests upon the machine base but is curved at its free end slightly upward and stands in position to be engaged by the hammer a little in advance of the engagement of the hammer with the bell,.so that in the operation of ringing the bell this part of the spring is put under tension and will operate to immediately raise the hammer from the bell after the bell as been rung. This prevents the continued vibration of the hammer in contact with thebell after the bell has been struck, The operating member 17' of the spring projects upward from the machine base into a position such that it engages the flat base 12" of the hammer stem ata point above its pivotal connection with the supporting standard 15. member of the spring is put under tension as the hammer is rotated to the left, as shown in Fig. 2, and when the hammer is rcleasedit causes said hammer to strike the bell. The rock shaft 11 is provided at its rear end with a crank arm 11 carrying acrank pinll which projects through a slot l2 formed in the hammer.

The operation of the device is as follows: Consider the parts in that position which they occupy after the bell has been struck toward the ri ht hand margin thereof (see i E' &

Fig. 2), the stop lug 9 of the stop member 8 strikes the do; I l and rotates it toward the left. is soon as the lug or heel 14- of said dogstrikes the crank arm 13. said crank arm is rotated toward the left and with it, the rock-shaft 11, the crank arm 11 and crank pin 11". This movement of the crank pin raises the hammer against the action of the operating member 17 of the spring. thereby put-tin said member of the spring under tension. Faid movement is continued until the stop lug 9 slides oil the end of the dog 14-. when the crank-arm 13 is released, and with it the hammer. which is then caused to forcibly strike the bell under the action of the member 17 of the spring. Just before the hammer strikes the bell, its rounded lower face engages the cushion member 17 of the spring. which is thus under tension when the bell is finally struck, and returns the hammer to a position slightly above the bell, thereby prevent This ing the continued Vibration of the hammer with the bell after the latter has been struck.

YVe claim as our invention 1. In a typewriting machine, in combination with the machine base, the papercarriage, a bell, a swinging hammer. and means actuated by the carriage for swinging said hammer away from said bell and for releasing it at a predetermined point, a standard adapted to support said hammer, a spring for operating and controlling said hammer, means for adjustably securing said standard and said spring to the machine base, said spring consisting of a hannner-operating member adapted to be put under tension when said hammer is swungaway from said bell, and of a cushion member adapted tobe struck by said hammer previously to the engagement of said hammer with the bell, and to remove said hammer from contact with the bell alter the bell has been struck.

2. In a typewritiug machine, in combination with the machine frame, the paper-car riage, a bell secured to'the machine frame, aswinging hammer, and means actuated by the carriage for swinging said hammer away from said bell and for releasing it at a predetermined point, a standard for said hammer embracing an upright, member to which said hammer is pivotally connected and a slotted base, aspring for controlling and actuating said hammer comprising a flat loop extension lying beneath said standard base and having upright lugs engaging the marginal edges of said standard base, an operating member adapted to be put under tension when said'hammer is swung away from said bell, and a cushioning member adapted to be struck by said hammer pre- Yiouslyto the engagement of said hammer with the bell and to remove said hammer from contact with the bell after the bell has been struck, and a screw adj ustably securing said standard base and said loop extension of the spring to the machine frame.

3. In a typewriting machine, a bell-ringing mechanism including a swinging hammer. said hammer comprising a head and a stem having a fiatbase, means for pivotally mounting said hammer, and a controlling and actuating spring for said hammer comprising an upright member engaging the flat. base of said stem and a cushion member adapted to be struck by the head of said hammer previousl) to its engagement with the bell and to remove said hammer from contact with the bell after said bell has been struck.

4. In a typewriting machine, in combina tion with the machine frame, the paper-carriage, a bell secured to the machine frame, a swinging hammer, and means actuated by the carriage for swinging said hammer away from said bell and for releasing it at a predetermined point, i tandard for said hammeiembracing an wright member to which said hammer is PIN-112111;! connected and also a base, a spring for cor. rolling and actuating said hammer comprising a iateraiiy eX-' one of said bases adapted to engage with the other base and means for securing said bases to the machine frame.

In testimony, that we claim the foregoing as our invention we athx our signatures in the presence of two witnesses, this 30th day 7 of June A. D. 1910.

GEORGE J. GRIFFITHS. CHARLES RODERICK.

iVitnesses:

A. J. )IULLE N, B. C. YOUNG. 

